On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
160
Gorillas can catch human colds and other illnesses.
205
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
It takes about 20 seconds for a red blood cell to circle the whole body.
102
In one day, adult lungs move about 10,000 litres of air.
11
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Early American humans hunted car-size armadillos and used their shells for houses.
12
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127